package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

/**
 * @author OZ.L.XO
 * #Description UserService
 * #Date: 2025/7/9 20:34
 */
@Service
@Slf4j
public class UserServiceImpl implements UserService {
    //微信服务接口映射
    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;
    /**
     * @Description
     * @Param [userLoginDTO]
     * @Return com.sky.entity.User
     */

    public User weixinLogin(UserLoginDTO userLoginDTO) {
        String openid = getOpenid(userLoginDTO.getCode());
        //判断openid是否为空，如果为空登录失败，抛出异常
        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断当前微信用户是否为新用户，新用户自动完成注册
        User user = userMapper.getByOpenid(openid);
        if(user == null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }

        return user;
    }
    /**
     * @Description 获取微信用户openid
     * @Param [code]
     * @Return java.lang.String
     */
    private String getOpenid(String code) {
        //调用微信接口服务，获得当前微信用户openid
        Map<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        //调用微信接口服务，获得当前微信用户openid
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        log.info("微信接口返回的json数据：{}",json);
        JSONObject jsonObject = JSON.parseObject(json);
        log.info("json:{}",jsonObject);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
